Electrode for electric furnaces



p 1929 P. L. .1. MKGUET 1,728,071

ELECTRODE FOR ELECTRIC FURNACES Filed Dec. 25, 1927 2 Sheets-Sheet 1 mlnnnmn,

Sept. 10, 1929. P. L. .1. MIGUET 1,728,071

ELECTRODE FOR ELECTRIC FURNACES Filed Dec. 25, 1927 2 Sheets-Sheet 2 W M &

Patented Sept. 10, 1929.

UNITED STATES PATENT OFFICE.

PAUL LOUIS JOSEPH MIGUET, E ST.-JULIEN-DE-MAURIENNE, FRANCE, ASSIGNOB '10 SOGIETE ELECTBOMETALLURGIQUE DE MONTRIGHER, 0F ST.-J'ULIEN-DE-IAUBI- ENE E, FRANCE.

ELECTRODE FOR ELECTRIC FURNACES.

Application filed December 23, 1927, Serial No. 242,224, and in France October 13, 1927.

This invention relates to improvements in electrodes of the type described in the specification of Serial No. 138,540 filed Septemher 29th, 1926. I

The prior application describes a built up cylindrical electrode comprising sections separately mounted on a metal frame means for doing away with overheating and axial gaseous accumulation by the preventing current from flowing in the filling in material and improving the mixing of the feed material by penetration between the sections.

The present invention relates to improvements in the mounting and positioning, jointing and replacing of the sections by a conducting filling material.

These improvements are characterized b 1. The sections are in contact with the metal frame along all their inner face and not only at certain points.

2. The mounting is effected by means of the metal frame to levers and not directly to the usual axle.

3. The jointing is eiiected by the injection of a carbon sugar paste or carbon glucose having the consistency of grease and not bv plaster or cement.

4. They are prolonged by metal portions of the same shape filled with a conducting material. I

The advantages of these improvements are as follows 1. The sections can carry the transverse pressure of the current carrying conductors and may be airtight (closed rurnacesl.

2. The mid point holding bolts are relieved irom supporting the greater part of the weight of the electrode or the balancing weights therefor,

- 3. The joints no longer give use to objection able chemical action,

4. The jointings are independent of the metal framing.

The invention will be described with reference to the accompanying drawings 2- Figs. 1 and 2 are respectively a vertical section and sectional plan of a cylindrical electrode having dovetailed joints the Sections being mounted on an interior metal frame.

Figs. 3 and 4 are respectively a vertical section and plan of the members carrying the metal framing.

Figs. 1 and 2 show that the sections 19 preferably equal in size but afiixed according to circumstances are afiixed by bolts to small stanchions 51 carried by rings 42 to which they are afiixed by bolts 53, the section being dovetailed into each other midway between the ends, brackets 54 connecting lengths of stanchion 51 together and also to suspension bolts 55.

These figures also show the lateral faces of the sections formed with grooves 56 to receive jointing material such as sugar carbon paste or carbon glucose under pressure.

The metal extension sections 19 connected together by bolts 57 and to the stanchions 51 by brackets 58 which entirely frees the space 59 for filling material.

With this construction and arrangement of metal framing the stanchions 51 carry most or the forces exerted on the electrode and only leave the sections open to compression forces which their natural mechanical properties can readily withstand.

The jointings of sugar carbon or glucose carbon have no chemical action on the sections themselves.

The metal sections acting as continuations of the carbon may receive the filling without interfering with the suspension members.

Referring to Figs. 3 and 4 the separate suspension bolts operated by nuts 60 are connected together in two sections by a chain of gear wheels 61 which through a worm wheel 62 in each section receive motion through worms 63 from a motor 64.

With such an arrangement having two separate groups of controls there is no dif- .iiculty in construction or danger to the electrode.

What I claim as my invention and dc sire to protect by Letters Patent is l. Aln electrical furnace electrode comprising a series of superposed annular sections and; a metal ifrarne arranged vertically in said electrode, said frame comprising stanchions which bear against the inner sides of said sections and transversely arranged members connecting said stanchions, said frame being secured to the several sections of the electrode and serving to support said sections each independently of the others.

2. An electrical furnace electrode comprising a series of superposed annular sections each. composed of a plurality of segmental members, and a metal frame arranged vertically in said electrode and comprising stanchions which bear against the inner sides of said sections and transversely arranged members connecting said stanchions, said frame being secured to the several members of the several sections of the electrode and serving to support said members and said sections each independent- 1y of the others.

3. A cylindrical electrode comprising sections detachably secured together and a metal frame in said electrode secured to sections thereof and including vertical stanchions, said stanchions at opposite sides of the electrode having vertical screws extending from their upper ends, nutson said screws, supporting bearings for said nuts and means to turn said nuts and thereby cause them to coact with the screws to raise or lower the stanchions and hence correspondingly raisev or lower the electrode.

4. An electrode as claimed in claim 3, in which each nut has a worm wheel and also including worms engaging said worm wheels and means for rotating said worms.

5. An electric furnace electrode provided with upwardly extending sustaining screws, nuts on said screws each provided with a chain wheel. endless chains connecting said chain wheels in two groups each independent of the other, two of said nuts, at substantially diametrically opposite points, be ing alsd provided with worm wheels, operatmg worms engaging said worm wheels and supporting bearings for the said nuts.

n witness whereof I aifix my signature.

PAUL LOUIS JOSEPH ,MIGUET. 

